Asbestos fiberizing apparatus



- March 18, 1947. w. J. JOYCE, JR 2,417,599

ASBESTOS FIBERI Z ING APPARATUS Filed Jan. 27, 1944 4 Shoots-Shoot 1 FZ9] g,

March 8. 1947. w. J. JOYCE, JR 2,417,599

ASBESTOS FIBERIZING APPARATUS I Filed Jan. 2'1, 1944- 4 Shani-Shut 2mmnn &

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March 18, 1947. J JQY CE, JR 2,417,599

ASBESTOS FIBERIZING APPARATUS Filed Jan. 27, 1944 4 Sheets-Sheet 3 ay MMarch 18, 1947. w. J. JOYCE, JR 2,417,599 ASBESTOS FIBERIZING. viPARA'l'US Filed Jan. '27, 1944 4 Sheets-Shut 4 Patented Mar. 18, 7

UNITED STATES PATENT OFFICE I i 2,417,599 1 v ASBESTOS mnmznsa APPARATUSWilliam J. Joyce, In, Manhelm, Pa... assignor'to Raybestos-Manhattan,Inc., Pascale, N. 1., a w corporation of New Jersey l ApplicationJanuary 27, 1944, Serial Dim 519,894

50mm. (cue-s) This invention relates to improvements in apparatus forreducing particles of asbestos to individualized fibrous form.

It is an object of this invention to fiberize asbestos in a mannerwhereby crude asbestos is effectively opened to provide a maximum amountof fibres of good length and to avoid undue shearing or damage to thefibres during 'progressive passage through the apparatus and attendantloss or waste. r

In general the apparatus of my inventioncomprises a plurality of spacedhorizontally supported rolls alternately provided with longitudinallyand circumferentially extending rigid ribs, the ribbed rolls beingaligned to act successively on the asbes-i tos during its passagethrough the apparatus in cooperative relationship with juxtaposed.jointly Fig. 9 is a fragmentary section taken on the line 9-'-9 of Fig.8.

Referring to the drawings, the form of apparatus illustrated in Figs. 1tab comprises a housing in within which are'positioned a plurality ofpairs of rolls aligned to act successively on the asbestos introducedthrough hopper I i and chute t2, the latter being provided with suitablevibrating mechanism. diagrammatically indicated at 13 and preferably inthe form of an electromagnetic vibrator, to aid in providing a steadyflow or blanket of asbestos to the nip of the first pair movableresilient surfaced means, such as for;

example one common or a like number of rubber surfaced rolls. In thismanner the crude asbestos is progressively and alternately subjected tocushioned pressure and flexure in the direction-of its movement andtransversely thereto, as distinguished from shearing, and as a resultinjury to the fibre, shorteningof fibre length, and undue production offines and dust is greatly reduced.

Other objects relate'to the construction of the apparatus and thearrangement-of parts in my illustrated preferred form of constructionwhereby only one of the juxtaposed moving or rolling surfacesispositively driven and the other driven through frictional yieldingengagement, which likewise is conducive to preservation of good fibrelength and is oi considerable economy in the construction and operationof the apparatus.

Further objects and advantages will be apparent from a consideration ofthe following specification and drawings, wherein: I

Fig. 1 is asectional elevation of one form of my apparatus viewed on theline lof- Fi 2.

t Fig. 2 is a sectional elevation taken. on the line 2-2 of H8. 1.

of rolls. One roll ll of each pair is of smooth cylindrical form andcomposed of, or surfaced with, rubber or similar rubber-like.or rubberyresilient material. These. rolls M are vertically aligned and spacedfrom each other, their shafts l5 being endwise journalled in bearingblocks 15 slidably mounted in guideways provided on the frame standardsi'l-i'l. Each roll I4 is held in yieldable and adjustable frictionalengagement with one of its companion ribbed rolls i8 or I! by suitablespring pressed means such as the spring 39 positioned between thebearing block it and the spring seat 2| slidable in the bearingguideway, the latter being adjustable by means of the screw 22 threadedthrough the guideway cap 23. If desired spring 39 may be omitted andscrew 22 permitted to press spring seat 2| directly I against bearingblock it.

The second roll of each pair is composed of rigid material, suchasmetal, and is provided with like rigid ribs, alternatelrolls i8 and i9being provided with circumferentially and longi- Fig. 3 is a fragmentaryend elevation viewed on the line 3-3 of Fig. 1.

Fig. 4 is a fragmentary transverse section on theiine 4-4 of Fig. 1.

F18. 5 is a sectional detail taken on the line 5-5 of F18. 4.

Fig. 6 is a sectional elevation of a modified form of apparatus taken onthe line 5-6 of Fig. 8.

Fig. 7 is a fragmentary sectional detail of one 01' the ribbed rolls andthe resilient surfaced roi of the form of apparatus of Fig. 6.

Fig. 8 is a front elevation of the apparatus of Fig. 6 with a sectionthrough the housing.

tudinally extending ribs, respectively. The rolls l8 and I! are likewisemounted in vertical spaced 7 relation with their shafts 20 fixedlyjoumalled in the frame standards lI-i'l within suitable bearin s 24. Oneend of each of the shafts 20 extends through the side wall of thehousing i0.

this outer end portion being further joumalled in a bearing 25 supportedin the upright 26, and carries at its outerend a beveled crown gear 2'1.Each of the gears 21 meshes with a beveled pinion gear 28 secured to thevertical common drive shaft 29, the latter being driven through thebeveled gears 30, 3|, shaft 32 and pulley 33 supported from thetransverse member 34. By causing the ribbed rolls l8 and I9 to be drivenin a clockwise direction, crude asbestos introduced to the hopper Iiwill be caused to progressively pass between each roll pair andbe'progressiveiy acted upon and flberized as previously described.Although not illustrated, means may be provided for positively drivingrolls it also.

As indicated in Fig. 2. a scraper 35 may be positioned to act againstthe surface of each resilient roll l4. inclined towards the nip of thenext lower roll pair, to remove surface accumulation and to aid inguiding progressive movement of the asbestos. Instead of scraper 35 avibrating or rotating beater, not illustrated. may be used to removesurface accumulations of the asbestos. The fiberized asbestos leavingthe nip of the lowermost roll' pair passes to the funnel 36 and is blownoutwardly through the conduit 31 by means. oi? air introduced throughthe line 38, which serves not only to remove the fiberized material butalso to find up the fibres and sepa- 7 rate them further.

The form of my invention illustrated in Figs.6 to 9 comprises a housing40 within which there is mounted a roll 4| of relatively large diameterv provided with a smooth cylindrical rubber or the Q 1 the funnelgenerally indicated as 58 and which comprises a transverse scraper edge59 acting against the last ribbed roll 46 and an oppositely inclinedscraper edge 60 acting against the surface of roll 4|. In place of thelatter a vibrating or rotating beater, not illustrated, may be employedto remove surface accumulations of asbestos. From here the asbestosfibers are blown out through conduit Si by means of a blast of airintroduced through line 62, which serves not only to remove thefiberized material but also to flui! up the fibers and separate themfurther.

I claim as my invention:

v 1. An asbestos fiberizing apparatus comprising roll means including aplurality of spaced horizontally supported rolls, alternate rolls beingprovided with longitudinally extending rigid ribs, intervening rollsbeing provided with circumferentially extending rigid ribs, said ribbedrolls being aligned to act successively on the asbestos during itspassage through the apparatus in eooperative'relationship withjuxtaposed resilient cylindrical surfaced'roll means, means yieldably'urging said horizontal roll means and said resilpositively driving atleast one of said roll means,

A plurality of'spaced rolls 48 and 41 positioned parallel to each otherand to roll 4i and of relatively smaller diameter, all composed of arigid material such as metal and alternately pro-. vided withcircumferentially and longitudinally extending rigid ribs, are supportedin juxtaposed vibrating means for introducing asubstantially uniformflow of asbestos to the apparatus, means relation to a forwardly anddownwardly moving peripheral portion of roll 4! for successively actingtherewith on the crude asbestos to fiberize it during its passagethrough the apparatus, in the manner previously described. The rolls 48and 41 are spaced and positioned against somewhat less than 180 of theperiphery of roll 4i and the first roll may be positioned somewhat inadvance of a vertical plane passing through the axisvof roll 4|, thatis, against the still upwardly moving surface thereof.

The ribbed rolls 4B and 41 are held in yieldable and adjustablefrictional engagement with the resilient surface 42 of roll 4|.

slidably mounted in radial guideways formed in.

the arcuate upper end portions 4545', of thestandards 45-45. A spring 50is positioned between each bearing block 49 and spring seat ii, thelatter being adjustable by means of a screw 52 threaded through aguidew'ay cap 58. If desired spring 50 may be omitted and screw 52permitted to press spring seat 5| directly against bearing block 49.Although not illustrated, means may be provided for positively drivingthe rolls 46 and 41 also.

Crude asbestos is introduced to the housing 40 through the hopper 54 andfed to the surface of roll 4i in the direction of its rotation, and inadvance of'the first ribbed roll, by means of the inclined chute 55aided by a vibrating mechanism "generally indicated at 56. but whichpreferably is in the form of an electromagnetic vibrator wherebyamplitude of vibration may be adjusted to obtain thickness of feedingdesired. The asbestos is then fiberized while conveyed on the resilientsurface 42 of roll 4|, by being successively sub- Jected to cushionedpressure and flexure alternately in the direction of rotation of therolls and transversely thereto. If asbestos is fed to the full width ofthe roll it may be laterally confined thereon by means of roll flanges51. After leaving the last ribbed roll the fiberized asbestos drops toEach of their shafts 48 are endwise journalled in a bearing block 49 forreceiving the resultant fiberized material after it has passed betweenthe roll means, and pneumatic means for removing said resultantfiberized material from said receiving means and for flumn up the fibersand separating them fnrther. I v

2. An asbestos fiberizing apparatus comprising a plurality of pairs ofrolls aligned to act successively on the asbestos during its passagethrough the apparatus, one roll of each pair being ing companion rollsof said pairs being provided with circumferentially extending rigidribs, means yieldabiy urging one roll of each pair toward its companionroll, and means for driving said rolls.

4. An asbestos fiberizing apparatus comprising a plurality of pairs ofrolls aligned to act successively on the asbestos during its passagethrough the apparatus, one roll of each pair being provided with aresilient cylindrical surface, alternate companion rolls of said pairsbeing provided with longitudinally extending rigid ribs,

and intervening companion rolls of said pairs being provided withciroumferentially extending rigid ribs, said resilient rolls being inspaced vertical alignment, said ribbed companion rolls being injuxtaposed spaced vertical alignment,

means for driving said ribbed companion rolls, and means yieldabiyurging said resilient rolls toward their ribbed companion rolls forrotation .thereby.

5. An asbestos fiberizing apparatus comprising roll means including aplurality of spaced horizontally supported rolls, alternate rolls beingprovided with longitudinally extending rigid ribs, intervening rollsbeing provided with circumierentiaily extending rigid ribs, said ribbedrolls being aligned'to act successively on the asbestos during itspassage through the apparatus in cooperative relationship withjuxtaposed resilient cylindrical surfaced roll means, means yieldabiyurging one of said roll means toward the other, means for positivelydriving at least one of said roll means, means for receiving theresultant fiberlzed material after it has passed between the roll means,and pneumatic means for removin the resultant flberized material Iromsaid receiving means and for flufllng up the fibers and separating themfurther.

WILLIAM J. JOYCE, Jud

nmmczs mm The i'ollowina references are oi record in the file of thispatent:

UNITED STATES PATENTS Number Name Date 852,503 Green May '1, 19071,021,269 Schlichten Mar. 26, 1912 1,315,521 Haddock, et a1. Sept. 9,1919 2,219,077 Pharo Oct. 22, 1940 305,721 Stietenroth Sept. 23. 18841,308,378 Schlichten July 1. 1919

